Title

3D MULTIPHASE MULTICOMPONENT MATHEMATICAL MODEL OF THE SHAFT FURNACE FOR SELF-REDUCING PROCESS

3D MULTIPHASE MULTICOMPONENT MATHEMATICAL MODEL OF THE SHAFT FURNACE FOR SELF-REDUCING PROCESS

Authorship

Paco, Lesly Jeaneth Mamani; Castro, José Adilson de; D’Abreu, José Carlos

Paco, Lesly Jeaneth Mamani

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Castro, José Adilson de

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D’Abreu, José Carlos

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DOI

10.5151/5463-5463-0020

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Abstract

DRI demand continues increasing due to shortage of high quality scrap for the steel production using electric arc furnace. In this context, the shaft furnace based on self- reducing process becomes alternative to supply the demand of metallics. This technology has the advantage of possible recycling solid waste materials from iron and steelmaking industries since the self-reducing agglomerate are mixtures of fine ore/ residues and reducing agent. The principal characteristic is the "internal environment of the agglomerate", this results in high rates of reduction (extraction of the oxygen from the ore) due to the kinetic conditions. The present paper aims to develop a mathematical model capable of simulating the operating conditions of the shaft furnace with self-reducing agglomerate, lump coal and secondary gas injection. The model used the technique of finite volume to solve the transport equations of momentum, energy and chemical species of both, solid and gas phases considered in this model. The main finds of this paper are: a) the self-reducing furnace can operates with a mixture of self-reducing briquettes and anthracite, b) the productivity of the process can achieve 35.5 t/m3/day, c) the process produces outlet gas with high calorific value.

DRI demand continues increasing due to shortage of high quality scrap for the steel production using electric arc furnace. In this context, the shaft furnace based on self- reducing process becomes alternative to supply the demand of metallics. This technology has the advantage of possible recycling solid waste materials from iron and steelmaking industries since the self-reducing agglomerate are mixtures of fine ore/ residues and reducing agent. The principal characteristic is the "internal environment of the agglomerate", this results in high rates of reduction (extraction of the oxygen from the ore) due to the kinetic conditions. The present paper aims to develop a mathematical model capable of simulating the operating conditions of the shaft furnace with self-reducing agglomerate, lump coal and secondary gas injection. The model used the technique of finite volume to solve the transport equations of momentum, energy and chemical species of both, solid and gas phases considered in this model. The main finds of this paper are: a) the self-reducing furnace can operates with a mixture of self-reducing briquettes and anthracite, b) the productivity of the process can achieve 35.5 t/m3/day, c) the process produces outlet gas with high calorific value.

Keywords

Self-reducing agglomerates; Mathematical modeling; Shaft furnace

Self-reducing agglomerates; Mathematical modeling; Shaft furnace